|Date|Opponent#|Rank#|Site|Result|
|---|---|---|---|---|
|09/28/1946|at Illinois||Memorial Stadium • Champaign, IL|W 26-6|
|10/05/1946|Pittsburgh||Notre Dame Stadium • Notre Dame, IN|W 33-0|
|10/12/1946|Purdue|#3|Notre Dame Stadium • Notre Dame, IN|W 49-6|
|10/26/1946|at #17 Iowa|#2|Iowa Stadium • Iowa City, IA|W 41-6|
|11/02/1946|vs. Navy|#2|Memorial Stadium • Baltimore, MD|W 28-0|
|11/08/1946|vs. #1 Army|#2|Yankee Stadium • New York, NY|T 0-0|
|11/16/1946|at Northwestern|#2|Notre Dame Stadium • Notre Dame, IN|W 27-0|
|11/23/1946|at Tulane|#2|Tulane Stadium • New Orleans, LA|W 41-0|
|11/30/1946|#16 Southern California|#2|Notre Dame Stadium • Notre Dame, IN|W 26-6|

Question: in how many stadiums other than notre dam stadium did the fighting irish play in during the 1946 season?
Answer: 4